A block copolymer including one or more segments containing an ionic group (hereinafter referred to as an “ionic segment(s)”) and one or more segments containing no ionic group (hereinafter referred to as a “nonionic segment(s)”), wherein the ionic...

The present invention relates to a method for producing a polymer electrolyte molded article, which comprises forming a polymer electrolyte precursor having a protective group and an ionic group, and deprotecting at least a portion of protective groups con...

For the purpose to provide an electrolyte membrane superior in the properties such as conductivity and stability, this invention provides a sulfonated aromatic polyether characterized in that the principle backbone is represented by the general formula (1)...